Book  (1961)  Page(s) 118.  
 
W. C. Thorn. What's In a Name. There is 'Gertrude Gregory' named for the wife of C. W. Gregory

Book  (1959)  Page(s) 14.  
 
Harry H. Hazlewood.  Some New Roses for 1959.  
Gertrude Gregory HT. (Gregory 1957) A yellow sport from the richly coloured 'Lady Belper', with the same moderate growth of the parent.